When taking a drop within 1 or 2 club-lengths, is it necessary to go through the process of taking out your driver (or other club of choice) and performing the measurement? Or, if it's clear to everyone involved that you are within the required distance, is that sufficient?

So, for example, if I'm taking a drop from a lateral hazard within 2 club-lengths of where my last shot crossed the margin of the hazard (not nearer the hole) if I am clearly dropping within a yard of the hazard line, is that good enough? Or do I need to go through the whole song and dance of taking out a club and putting a tee in the ground?

Thanks.